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define(function(require, exports, module) {

  var SemanticHighlighter = exports.SemanticHighlighter = function(ast) {
    
    this.tokens = {};

    this.getTokens = function() {
      this.visit(ast);
      return this.tokens;
    };

   this.EQName = this.NCName = function(node)
   {
     var row = node.pos.sl;
     this.tokens[row] = this.tokens[row] === undefined ? [] : this.tokens[row];
     node.pos.type = "support.function";
     this.tokens[row].push(node.pos);
     return true;
   };

    this.visit = function(node) {
      var name = node.name;
      var skip = false;

      if (typeof this[name] === "function") skip = this[name](node) === true ? true : false;

      if (!skip) {
        this.visitChildren(node);
      }
    };

    this.visitChildren = function(node, handler) {
      for (var i = 0; i < node.children.length; i++) {
        var child = node.children[i];
        if (handler !== undefined && typeof handler[child.name] === "function") {
          handler[child.name](child);
        }
        else {
          this.visit(child);
        }
      }
    };
    
  };
  
});
